Pneumatic grinder



FIG. 1 is a top, rear and left side perspective view of a pneumaticgrinder showing my new design;

FIG. 2 is a bottom plan view;

FIG. 3 is a right side elevational view;

FIG. 4 is a top plan view;

FIG. 5 is a front elevational view; and,

FIG. 6 is a rear elevational view.

The ornamental design for a pneumatic grinder, as shown and described.